Information to be provided:Silo supplier is to provide lime silo drawing and foundation loads with state of TX PE stamp.STM will provide “alleviator” dimensions and weight.

On site civil work:

Design foundations for lime silo, and for future sodium bicarbonate silo. Advise client of area required, and required density of any backfill. Client to remove any existing foundations and backfill with required density of fill. Excavate and install foundations, c/w embedded silo anchor bolts.

CIVIL WORKS Solid foundation earthen material is assumed to be found at an average depth of 2’-0” from grade. Scope of work to be in accordance with foundation design drawings, and to include: Silo Foundation Pad: • Excavation of existing earthen material up to 36" deep. Additional removal of another 12" of material around perimeter max for 30’-0" x 30’-0" wide footing. • Installation of 12”-24" of compacted rock under pad inside perimeter footing. • Installation of qty 4 x #6 bar in footings, and two mats of #4 bar on 24" centers for pad. (To be confirmed with foundation design drawings) • Concrete to be 30' x 30’ x 24" deep pad and 30” wide x 30” deep footing at the outside of the pad. (To be confirmed with foundation design drawings) • Silo Pad. Installation of 4,000 (psi) mix cement with a broom finish at a finish height of 4" above grade. (To be confirmed with foundation design drawings) • Installation of two 10' x 3/4" grounding rods, at opposite corners of the pad. • Ground cable (4/0 BARE copper cable) to be buried in concrete, To be thermo welded to: existing ground grid (location to be determined at site), each grounding rod, and with a single pig tail for silo connection. 50’ max length allowed. Grounding for pipe bridge will need to be determined.

Pipe bridge foundation:

• Foundation requirements to be evaluated Alleviator Support foundation: • Foundation requirements to be evaluated

• Note: All concrete to be supplied, mixed and delivered to the site by Buzzi at no cost to STM or foundation installation subcontractor. (Any testing required, if it is required by contract or governing law, is to be carried out by foundation installation subcontractor.

Transport Piping 4” S40 Galvanized Carbon Steel piping with Plate flange connections (not standard 150# flanges) Cost of 4” flanges: std flange SS $40. Plate flanges CS $11.90 pipe fittings direct.com. $48 for ss304. Slip on flange CS 150# $15.70. Socket weld CS 150# $18.67. Weld neck flange CS 150# $18.69. Do we do threaded to avoid having to paint threaded = $18.73 CS 150#. Work out details later. All pipe runs are to be horizontal and vertical. Supported on existing support steel (where required) . 1 and 400 ft to Point 2. Transportation pipe to be supported over the road to north of silo by a pipe bridge. As simple as possible. Support for pipe bridge to be simple foundations. Is it possible to use existing pipe rack? A little longer route, but less work?

Possible Arrangements considered:

 Mount filter receiver at grade on support steel, use screw conveyor to lift material to approx. 8 – 10 ft? to bucket elevator. Requirement for foundations to be evaluated  Or mount filter receiver at a higher elevation, possibly hanging from available? Support steel above, and use rotary valve to drop through chute to bucket elevator.  NEEDS FURTHER CONSIDERATION.

For Reference, please see attached:

P&ID - from client enquiry This is a guide only. Scope of supply should be determined from this document.GA – from STM proposal for reference.Buzzi’s Maryneal DSI System – Location Plan For an indication of the approximate layout of the plant.